The scientific consensus among criminologists and other researchers is that the ban had little to no effect on overall criminal activity, firearm deaths, or the lethality of gun crimes. Studies have found that the overwhelming majority of gun crimes are committed with weapons which are not covered by the AWB, and that assault weapons are less likely to be used in homicides than other weapons. There is tentative evidence that the frequency of mass shootings may have slightly decreased while the ban was in effect, but research is inconclusive, with independent researchers finding conflicting results.